Tacos Digest, Vol 133, Issue 36

[Tom Azlin W7SUA]

Hi Chip.

Why do you presume it is a TMARC coordinated repeater causing the 
problem? Might not even be an uncoordinated repeater. If it is a digital 
signal and not just intermodulation interference from some other high 
power transmitter. Almost sounds like a pager at some spots in that 
recording. Not at all what I remember D-STAR sounding like. but I have 
not tried to feed this into a D-STAR decoder.

Also TMARC coordinated exactly four repeaters on the 10 KHz interstitial 
frequency down in the 20KHz channel area where there was believed to be 
sufficient geographical separation AND warned the D-STAR repeater owners 
they might have to shift. Only in one of those four was there an issue ( 
near far problem ) so the digital repeater went off the air until a 
regular coordination came open. In the other three cases they knew their 
physics just fine. In the rest of the TMARC area the digital repeaters 
are on normal channel spacing for 2m...

On 70cm the narrow band digital repeaters can be offset by plus or minus 
6.25KHz sharing one 25KHz channel. And same rules on geographical 
separation.

73, tom w7sua

On 3/22/2014 8:55 PM, Chip Fetrow wrote:
> Our coordinator, T-MARC does not understand physics.  They are coordinating digital repeated between FM repeaters.
>
> IDIOTS!
>
>
> On Mar 22, 2014, at 7:01 PM, tacos-request at amrad.org wrote:
>
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>> Today's Topics:
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>>    1. Please help decode this audio file! (William "Bill" Kisse)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Sat, 22 Mar 2014 16:01:12 -0700 (PDT)
>> From: "William \"Bill\" Kisse" <WA3GJD at arrl.net>
>> To: "tacos at amrad.org" <tacos at amrad.org>
>> Subject: Please help decode this audio file!
>> Message-ID:
>> 	<1395529272.88916.YahooMailNeo at web125405.mail.ne1.yahoo.com>
>> Content-Type: text/plain; charset="utf-8"
>>
>> The Ashton RCS 147.00 repeater has been hammered all day with what appears to be users on the 146.40 input using digital mode.
>>
>> This?does not?appear to be P25 and may be D-Star.
>>
>> Can anyone help with decoding the attached digital audio file so we can let these users know they are making the 147.00 repeater unusable?
>>
>>
>> The audio file is attached.
>>
>> Many thanks.
>>
>> 73,
>>
>> Bill
>> WA3GJD
>> ?
>> William "Bill" Kisse
>>
>> 301-908-8279
>> ?Never doubt that a small group of thoughtful citizens can change the world. Indeed, it is the only thing that ever has.?
>> Margaret Mead,?American Cultural Anthropologist??
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